1.

When an electric current is passed through an aqueous solution of sodium chloride

Answer»

`H_(2)` is evolved at the anode
OXYGEN is evolved at the cathode
its pH progressively decreases
its pH progressively increases

Solution :During ELECTROLYSIS of `NACL (aq) , H^(+)` ions are DISCHARGED at cathode and the pH of solution increases due to decrease in `[H^(+)]` .


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